CN105173056A - Wing fuel tank protective cap and forming process thereof - Google Patents
Wing fuel tank protective cap and forming process thereof Download PDFInfo
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- CN105173056A CN105173056A CN201510493492.7A CN201510493492A CN105173056A CN 105173056 A CN105173056 A CN 105173056A CN 201510493492 A CN201510493492 A CN 201510493492A CN 105173056 A CN105173056 A CN 105173056A
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- layer
- lid body
- wing tank
- fuel tank
- pressure ring
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Closures For Containers (AREA)
Abstract
The invention discloses a wing fuel tank protective cap and a forming process thereof and relates to the technical field of transportation. The wing fuel tank protective cap comprises a cap body; the cap body and a clamping pressure ring clamp skin; the cap body comprises a protective layer and a reinforcement layer inside the protective layer; the protective layer is used for preventing lightning and fire; the reinforcement layer is made of polyethylene fibers and used for achieving the function of resisting outer object impact. According to the forming process of the wing fuel tank protective cap, the wing fuel tank protective cap is formed through a resin transfer molding forming process by preparing corresponding materials. According to the wing fuel tank protective cap and the forming process thereof, the problems in the prior art that a wing fuel tank cap is complex in structure, poor in shock resistance, seriously affected by environmental factors, low in production efficiency and high in cost can be solved.
Description
Technical field
The present invention relates to technical field of transportation, particularly relate to a kind of wing tank protection lid and forming process thereof.
Background technology
Civil aircraft wing can arrange access hole along spanwise at lower aerofoil, for personnel's turnover, to ensure maintenance repair needs.Maintenance lid is the important component part of Oiltank structure, is used for accurately ensureing wing external surface.Meanwhile, because most of lid is all positioned at fuel tank district, trial voyage or flight department to the shock resistance of maintenance lid, fire resistance, and the requirement of lightning barrier propterty is all strict.
Patent US20130338973A1 proposes a kind of double-layer clamping lid, and be made up of interior lid, outer lid, combined action is with content with funtion requirement.Although improve protecting against shock performance, interior lid and outer lid version are all comparatively complicated, need complete manufacture respectively, and require all higher to manufacturing process and assembly technology, and cost increases.
Existing lid comprises anti-impacting layer and packed layer substantially; for improving shock resistance; can adopt and add the port cover structure of Kevlar fiber structure (honeycomb, laminate) as protecting against shock material; but when it exposes in wet condition; remarkable to performance impact; need take extra moisture protection measures, but risk is not eliminated completely.Foamed materials is a kind of actv. lightweight filler, is applicable to be filled in hollow structure inside, improves the rigidity of structure, but traditional open celled foam has and certain deposits wet ability, and lid may be caused in use to increase weight.
Therefore, in prior art also there is certain hidden danger in the various aspects of performance of lid, needs badly and improve to eliminate its deficiency to existing lid.
Summary of the invention
The object of the invention is to propose a kind of wing tank protection lid, structure is simple, the impact of environment can be overcome, there is good shock resistance, can prevent fires, anti-lightning, corrosion prevention.
Another object of the present invention is the forming process proposing a kind of wing tank protection lid, and this technique is simple, production efficiency is high, low cost of manufacture.
For reaching this object, the present invention by the following technical solutions:
A kind of wing tank lid, comprise lid body, described lid body clamps covering with clamping pressure ring, described lid body comprises the enhancement layer of protective layer and protective layer inside, described protective layer is used for anti-lightning, fire prevention, described enhancement layer is made up of polyethylene fibre, for playing the effect of opposing foreign object impact.
Further technical scheme, also comprises packed layer in described protective layer, and described lid body is assembled to after on fuel tank, and described packed layer is positioned at the inside of described fuel tank, and described packed layer is closed-cell foam, for alleviating the weight of described lid body.
Further technical scheme, described protective layer comprises carbon fiber layer and metal net layer, and described metal net layer is coated on described carbon fiber layer.
Further technical scheme, described metal net layer is copper mesh.
Further technical scheme, is bolted between described lid body and clamping pressure ring.
Further technical scheme, described lid body offers bolt hole, and described bolt hole comprises glass fiber enhanced nylon block and is embedded in the steel-wire screw-socket of described glass fiber enhanced nylon block inside face.
Further technical scheme, described lid body is stepped ramp type, be divided into ground floor step, second layer step and third layer step, described ground floor step is made up of enhancement layer, described second layer step and third layer step are packed layer, described bolt hole is opened on described second layer step, and described clamping pressure ring is bolted on second layer step, is clamped with covering between described clamping pressure ring and described third layer step.
Further technical scheme, the thickness of described ground floor step is identical with the thickness of described clamping pressure ring.
Further technical scheme, the face that described third layer step contacts with described covering is provided with seal groove.
Further technical scheme, step one, by closed-cell foam injection mo(u)lding, prepares suitable copper mesh and carbon fiber layer; Step 2, according to described lid body outline, mfg. moulding die; Step 3, puts into counterdie successively by copper mesh, carbon fiber layer, polyethylene fibre, closed-cell foam and top carbon fiber layer and copper mesh; Step 4, matched moulds, pressurizes, pours into resin, just obtains required product after solidification.
Beneficial effect of the present invention:
The wing tank protection lid that the present invention proposes, this lid is clamp structure, structure is not simply and with skin morph, be divided into protective layer and enhancement layer, protective layer can be prevented fires, anti-lightning, enhancement layer is that polyethylene fibre is made, polyethylene fibre has good shock resistance and mechanical property is in wet condition unaffected, can effectively prevent potential high speed fragment from puncturing lid, also there is lower thermal conduction rating, play heat-insulating, fire-preventing effect, in addition its good Corrosion Protection, can effectively avoid environment to the corrosion of lid.
The forming process of the wing tank protection lid that the present invention proposes, after preparation before the forming, puts into mould in order by the material of each layer, matched moulds, pour into resin, can form required wing tank protection lid after solidification, this kind technique is simple, production efficiency is high, and productive costs is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of wing tank provided by the invention protection lid;
Fig. 2 is the section-drawing of wing tank provided by the invention protection lid;
Fig. 3 is the assembling schematic diagram of lid body provided by the invention and clamping pressure ring.
Wherein, 1, protective layer; 2, enhancement layer; 3, packed layer; 4, pressure ring is clamped; 5, covering; 6, bolt hole; 7, ground floor step; 8, second layer step; 9, third layer step; 10, seal groove.
Detailed description of the invention
Technical scheme of the present invention is further illustrated by detailed description of the invention below in conjunction with accompanying drawing.
Embodiment 1
As Figure 1-3, a kind of wing tank lid, comprises lid body, and lid body clamps covering 5 with clamping pressure ring 4, lid body comprises the enhancement layer 2 of protective layer 1 and protective layer 1 inside, protective layer 1 is for anti-lightning, fire prevention, and particularly, protective layer 1 comprises carbon fiber layer and metal net layer, metal net layer is coated on carbon fiber layer, wherein metal net layer is copper mesh, and the electrical resistivity of copper mesh is little, moderate; Enhancement layer 2 is made up of polyethylene fibre, for playing the effect of opposing foreign object impact, and the mechanical property of still maintenance in wet environment itself, polyethylene fibre has lower thermal conduction rating in addition, play the effect of heat-insulating, fire-preventing, also there is good Corrosion Protection, can effectively avoid environment to the corrosion of lid.
Also comprise packed layer 3 in protective layer 1, packed layer 3 is positioned at the inner side of enhancement layer 2, and lid body is assembled to after on fuel tank, packed layer 3 is positioned at the inside of fuel tank, packed layer 3 is closed-cell foam, and closed-cell foam there will not be and deposits wet phenomenon, for alleviating the weight of lid body, be preferably PMI foam, in foamed materials, under equal densities condition, the compression of PMI foam, stretching, modulus of shearing and intensity are all high, in addition, its heat-resistant deforming temperature also reaches 220 DEG C; PMI foam lightweight, is filled in the thickness adding lid body in protective layer 1, and then improves lid rigidity, can bear the pressure of fluid to lid body.
Be bolted between lid body and clamping pressure ring 4, therefore lid body offer bolt hole 6, bolt hole 6 comprises glass fiber enhanced nylon block and is embedded in the steel-wire screw-socket of glass fiber enhanced nylon block inside face.
Particularly, lid body is stepped ramp type, be divided into ground floor step 7, second layer step 8 and third layer step 9, ground floor step 7 is made up of enhancement layer 2, and second layer step 8 and third layer step 9 are formed by packed layer 3, bolt hole 6 is opened on second layer step 8, clamping pressure ring 4 is bolted on second layer step 8, and be clamped with covering 5 between clamping pressure ring 4 and third layer step 9, bolt does not penetrate covering 5, therefore lid body is not out of shape with covering 5, does not participate in wing totally stressed.Particularly, the thickness of ground floor step 7 is identical with the thickness of clamping pressure ring 4, makes the external surface peripheral of fuel tank flap smooth, there will not be rough phenomenon.
The face that third layer step 9 contacts with covering 5 is provided with seal groove 10, ensures the leak tightness of wing tank.
Particularly, clamping pressure ring 4 is the outer glass fiber reinforcement plate covering copper mesh, and structure is simple, convenient formation.
The forming process of corresponding wing tank lid is specially: step one, by closed-cell foam injection mo(u)lding, prepares suitable copper mesh and carbon fiber layer; Step 2, according to lid body outline, mfg. moulding die; Step 3, puts into counterdie successively by copper mesh, carbon fiber layer, polyethylene fibre, closed-cell foam and top carbon fiber layer and copper mesh; Step 4, matched moulds, pressurizes, pours into resin, just obtains lid body after solidification.Step 3 and step 4 are resin transfer molding technique, this manufacture technics cost and energy consumption low, production efficiency is high.
In addition, clamp pressure ring 4 shaping also to can refer to above-mentioned step and carry out.
Embodiment 2
The structure that wing tank in the present embodiment and embodiment 1 protects lid is basically identical, comprise lid body, lid body clamps covering 5 with clamping pressure ring 4, lid body comprises the enhancement layer 2 of protective layer 1 and protective layer 1 inside, protective layer 1 is for anti-lightning, fire prevention, enhancement layer 2 is made up of polyethylene fibre, for playing the effect of opposing foreign object impact.
Difference is, the concrete shape of lid body is not limit, and concrete structure, the material of protective layer 1 are not limit, and this lid body can play fabulous shock proofly to act on.
Obviously, the above embodiment of the present invention is only to clearly demonstrate example of the present invention, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Claims (10)
1. a wing tank lid, it is characterized in that, comprise lid body, described lid body clamps covering (5) with clamping pressure ring (4), described lid body comprises the enhancement layer (2) of protective layer (1) and protective layer (1) inside, described protective layer (1) is for anti-lightning, fire prevention, and described enhancement layer (2) is made up of polyethylene fibre, for playing the effect of opposing foreign object impact.
2. wing tank lid according to claim 1, it is characterized in that, packed layer (3) is also comprised in described protective layer (1), described lid body is assembled to after on fuel tank, described packed layer (3) is positioned at the inside of described fuel tank, described packed layer (3) is closed-cell foam, for alleviating the weight of described lid body.
3. wing tank lid according to claim 1, is characterized in that, described protective layer (1) comprises carbon fiber layer and metal net layer, and described metal net layer is coated on described carbon fiber layer.
4. wing tank lid according to claim 3, is characterized in that, described metal net layer is copper mesh.
5. wing tank lid according to claim 2, is characterized in that, is bolted between described lid body and clamping pressure ring (4).
6. wing tank lid according to claim 5, it is characterized in that, described lid body offers bolt hole (6), described bolt hole (6) comprises glass fiber enhanced nylon block and is embedded in the steel-wire screw-socket of described glass fiber enhanced nylon block inside face.
7. wing tank lid according to claim 6, it is characterized in that, described lid body is stepped ramp type, be divided into ground floor step (7), second layer step (8) and third layer step (9), described ground floor step (7) is made up of enhancement layer (2), described second layer step (8) and third layer step (9) are packed layer (3), described bolt hole (6) is opened on described second layer step (8), described clamping pressure ring (4) is bolted on second layer step (8), covering (5) is clamped with between described clamping pressure ring (4) and described third layer step (9).
8. wing tank lid according to claim 7, is characterized in that, the thickness of described ground floor step (7) is identical with the thickness of described clamping pressure ring (4).
9. wing tank lid according to claim 7, is characterized in that, the upper face contacted with described covering (5) of described third layer step (9) is provided with seal groove (10).
10. processing as arbitrary in claim 3-9 as described in the forming process of wing tank lid, it is characterized in that, step one, by closed-cell foam injection mo(u)lding, prepare suitable copper mesh and carbon fiber layer; Step 2, according to described lid body outline, mfg. moulding die; Step 3, puts into counterdie successively by copper mesh, carbon fiber layer, polyethylene fibre, closed-cell foam and top carbon fiber layer and copper mesh; Step 4, matched moulds, pressurizes, pours into resin, just obtains required product after solidification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510493492.7A CN105173056B (en) | 2015-08-12 | 2015-08-12 | A kind of wing tank protection lid and its moulding process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510493492.7A CN105173056B (en) | 2015-08-12 | 2015-08-12 | A kind of wing tank protection lid and its moulding process |
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| CN105173056A true CN105173056A (en) | 2015-12-23 |
| CN105173056B CN105173056B (en) | 2018-06-29 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655509A (en) * | 2016-03-18 | 2016-06-08 | 宁德时代新能源科技股份有限公司 | Lower box body and battery box comprising same |
| CN109335016A (en) * | 2018-12-04 | 2019-02-15 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of fastener package sealing tool and its application method |
| CN111924113A (en) * | 2020-09-15 | 2020-11-13 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Structure of fuel tank opening cover and peripheral area of opening cover of airplane wing |
| CN112440081A (en) * | 2020-11-25 | 2021-03-05 | 上海晋飞碳纤科技股份有限公司 | Integrally formed large-scale product and manufacturing method thereof |
| CN112896532A (en) * | 2021-01-13 | 2021-06-04 | 中国商用飞机有限责任公司 | Oil tank cover and manufacturing process thereof |
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| US4530443A (en) * | 1983-11-10 | 1985-07-23 | The Boeing Company | Unitary access panel for aircraft fuel tanks |
| GB2378919B (en) * | 2001-07-04 | 2003-08-13 | Ruberoid Building Products Ltd | Damp proof course |
| US7576966B2 (en) * | 2006-02-23 | 2009-08-18 | The Boeing Company | Method and system for electrical bonding of fuel tank penetrations |
| CN101842230A (en) * | 2007-10-08 | 2010-09-22 | 古瑞特（英国）有限公司 | Composite laminated article and manufacture thereof |
| CN204937461U (en) * | 2015-08-12 | 2016-01-06 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of wing tank protection lid |
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2015
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| US4530443A (en) * | 1983-11-10 | 1985-07-23 | The Boeing Company | Unitary access panel for aircraft fuel tanks |
| GB2378919B (en) * | 2001-07-04 | 2003-08-13 | Ruberoid Building Products Ltd | Damp proof course |
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| CN101842230A (en) * | 2007-10-08 | 2010-09-22 | 古瑞特（英国）有限公司 | Composite laminated article and manufacture thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105655509A (en) * | 2016-03-18 | 2016-06-08 | 宁德时代新能源科技股份有限公司 | Lower box body and battery box comprising same |
| CN109335016A (en) * | 2018-12-04 | 2019-02-15 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | A kind of fastener package sealing tool and its application method |
| CN111924113A (en) * | 2020-09-15 | 2020-11-13 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Structure of fuel tank opening cover and peripheral area of opening cover of airplane wing |
| CN112440081A (en) * | 2020-11-25 | 2021-03-05 | 上海晋飞碳纤科技股份有限公司 | Integrally formed large-scale product and manufacturing method thereof |
| CN112896532A (en) * | 2021-01-13 | 2021-06-04 | 中国商用飞机有限责任公司 | Oil tank cover and manufacturing process thereof |
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| Publication number | Publication date |
|---|---|
| CN105173056B (en) | 2018-06-29 |
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